Novel synthesis and properties of pure and NV-doped nanodiamonds and other nanostructures

Narayan, J.; Bhaumik, Amiya

doi:10.1080/21663831.2016.1249805

Cited by 25 publications

(13 citation statements)

References 21 publications

(30 reference statements)

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“…We have also fabricated N-V (nitrogen-vacancy) doped nanodiamonds [13] with size ranging from 4 to 8 nm. Figure 8(a) shows photoluminescence (PL) versus energy spectra of as-deposited N-doped amorphous carbon film, and this film after annealing with 0.6 J cm −2 ArF laser pulse.…”

Section: Doping With N-and P-type Dopantsmentioning

confidence: 99%

Progress in Q-carbon and related materials with extraordinary properties

Narayan

Bhaumik

Gupta

et al. 2018

Materials Research Letters

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This paper summarizes our research related to Q-carbon and Q-BN and direct conversion of carbon into diamond and h-BN into c-BN. Synthesis and processing of these materials are accomplished by nanosecond laser melting and subsequent quenching of amorphous carbon and nanocrystalline h-BN. Depending upon the degree of undercooling, molten carbon (or h-BN) can be converted into Q-carbon (or Q-BN) or diamond (or c-BN). The primary focus here is on the outstanding properties of these materials, including hardness greater than diamond, ferromagnetism, pand n-type doping, NV nanodiamonds, high-temperature superconductivity in B-doped Q-carbon, enhanced field emission, superhard composite coatings, and future applications. IMPACT STATEMENT This research represents a fundamental breakthrough in the direct conversion of carbon into diamond at ambient temperatures and pressures in the air and their extraordinary properties.

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Section: Doping With N-and P-type Dopantsmentioning

confidence: 99%

Progress in Q-carbon and related materials with extraordinary properties

Narayan

Bhaumik

Gupta

et al. 2018

Materials Research Letters

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“…When the Q-carbon layer breaks into small filamentary structures like nanorods, then these provide nucleation sites to grow platelet structures normal to the substrate. By doping amorphous carbon layers with N and Si, nanodiamonds can be doped with N and Si to create NV and SiV doped nanodiamonds needed for quantum sensing, communication, and computing [17].…”

Section: Resultsmentioning

confidence: 99%

Formation of self-organized nano- and micro-diamond rings

Narayan

Bhaumik

Gupta

et al. 2021

Materials Research Letters

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We report formation of self-organized nanodiamond ring structures due to dynamical heterogeneity in super undercooled carbon, created by nanosecond laser melting of amorphous carbon layers. We envisage that diamond tetrahedra self-organize and lead to formation of string and ring structures on which nanodiamonds nucleate and grow. Denser ring structures are formed in Q-carbon due to higher undercooling and enhanced diamond nucleation. The average size is larger under heterogeneous nucleation compared to homogeneous nucleation due to lower critical size and free energy, allowing more time for growth. With nanosecond laser melting, growth velocities range 5-10 ms −1 and even higher for Q-carbon. IMPACT STATEMENTSignificant advancement in the creation of self-organized nanodiamond ring and string structures by laser processing at ambient pressure and temperature ARTICLE HISTORY

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“…The great interest and the exceptional range of applications of NDs is boosting the development of novel fabrication techniques, even if the actual technologies are already able to provide very pure nanodiamonds with controlled surface chemistry at a relative low cost. [148,149]…”

Section: Nanodiamondsmentioning

confidence: 99%

Is a Quantum Biosensing Revolution Approaching? Perspectives in NV‐Assisted Current and Thermal Biosensing in Living Cells

et al. 2020

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Understanding the human brain is one of the most significant challenges of the 21st century. As theoretical studies continue to improve the description of the complex mechanisms that regulate biological processes, in parallel numerous experiments are conducted to enrich or verify these theoretical predictions also with the aim of extrapolating more accurate models. In the fields of magnetometry and thermometry, among the various sensors proposed for biological application, nitrogen-vacancy (NV) centers are emerging as a promising solution due to their perfect biocompatibility and the possibility of being positioned in close proximity to the cell membrane, thus allowing a nanometric spatial resolution down to the nano-scale. Still many issues must be overcome to obtain either a sensitivity capable of revealing the very weak electromagnetic fields generated by neurons (or other excitable cells) during their firing activity or a spatial resolution sufficient to measure intracellular thermal gradient due to biological processes. However, over the last few years, significant improvements have been achieved in this direction, thanks to the use of innovative techniques. In this review, the new results regarding the application of NV centers will be analyzed and the main challenges that must be afforded for leading to practical applications will be discussed.

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Novel synthesis and properties of pure and NV-doped nanodiamonds and other nanostructures

Cited by 25 publications

References 21 publications

Progress in Q-carbon and related materials with extraordinary properties

Progress in Q-carbon and related materials with extraordinary properties

Formation of self-organized nano- and micro-diamond rings

Is a Quantum Biosensing Revolution Approaching? Perspectives in NV‐Assisted Current and Thermal Biosensing in Living Cells

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